This is a close up of the venomous dorsal-fin spine in a lanternshark (Etmopterus). Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!
Dorsal spine of Orthacanthus adamas from the Upper Freeport Coal (Carboniferous) of Linton, Ohio. The spine is about 71 mm long. Disclaimer: AAAS and EurekAlert! are not responsible for the ...
DESCRIPTION: Threespine sticklebacks average about two inches in length, with three spines in front of the dorsal fin and no bony plates on their sides. At spawning time males develop a red throat and ...
They scull the water like oars and can rotate through 180°. In addition to their paired fins, the second dorsal and anal fins also have stout, muscular lobed bases. The first dorsal fin ...